Recent observations suggest that scientists have identified potential microbial fingerprints in the atmospheres of other planets, raising intriguing questions about the possibility of alien life ...

This video explores five disturbing possibilities about alien life that challenge popular science fiction assumptions. Instead of friendly visitors or distant microbes, the scenarios focus on outcomes ...

High-energy particles zipping through the cosmos are harmful to life on Earth, but scientists think it could be food for potential alien life elsewhere. Saturn's moon Enceladus (shown here in a 2006 ...